Abstract: Objective To determine the content of Flavonids in celery extract and provide information of quality controlling for health food which was made of celery extract.Methods Rutin and quercetin were used as standard material respectively.The colormetric method was used to deter mine the content of flavonoids in celery extract.Also,the recovery ratio of both methods were compared.Results When rutin was used as standard material,the average content of flavonids in celery extract was 1.05% and the recovery ratio was 102% while quercetin was used,the average cotent of flavonids and the recovery ratio were 1.11% and 99.56% respectively.Conclusion Both methods for determing the flavonoid contents in celery extract are simple and useful,mean-while the determination repeatability is very good.